Twenty-one flights were reported as delayed, with average delay times ranging from 55 minutes to an hour.

Delta-Boeing-757, Courtesy of Delta Air Lines

Affected destinations were mainly in the Northeast U.S. including Boston, Newark, Washington Dulles and Hartford.

At Miami International Airport, there were 20 arrival and departure cancellations as of 4 p.m. due to Tropical Storm Irene. No delay information was reported.

The good news is that many airports along the Northeast are now open for business.

All major airports in the Northeast were reopened as of 7 a.m. Monday, except for Teterboro in New Jersey, according to the Fort Lauderdale airport official. And Philadelphia International resumed operations on Sunday.

New York’s JFK and Newark’s EWR airports are open to arriving flights, but departure flights are expected to resume at noon, the airport authority said.

Washington, D.C. -area airports – IAD and DCA – are operating full schedules, except for flights to and from Boston and New York, according to FlightAware.com.

At 8:19 a.m. Monday there were 1,448 system-wide cancellations, but that tally is expected to increase throughout the day, Flightaware said. Only 8 cancellations had been reported for Aug. 30.

More than 11,000 flights were cancelled over the weekend, according to FlightAware.

United Airlines and Continental Airlines were expected to resume flight departures at noon at its hub at Newark Liberty International Airport, John F. Kennedy International Airport and LaGuardia Airport, parent company United Continental Holdings said in a statement.

The airlines cancelled more than 2,200 flights on Saturday and Sunday due to then Hurricane Irene.

Amtrak is also reporting cancellations for some of its trains, while others have resumed operations including some with service to South Florida.

At least two ships cancelled stops at CocoCay over the weekend after Irene impacted the private island during its rampage in the Caribbean.

Norwegian Cruise Line’s Norwegian Gem, which remained at sea Sunday away from Irene’s path was expected to arrive in New York at 7 a.m. Monday, and guests for the August 28 cruise were being asked to arrive at the pier starting at noon.

The ship was scheduled to depart New York at 4 p.m. Aug. 29 en route to Bermuda for three full days there as scheduled, Norwegian said in a weather alert on its website.